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Finding the Fourth Proportional to 81,463.60, 122,195.40 and 68,341.60

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Solution

The fourth proportional to 81,463.60, 122,195.40 and 68,341.60 is: 102,512.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,463.60 : 122,195.40 = 68,341.60 : x
  2. Step 2: Convert to fraction form
    81,463.60/122,195.40 = 68,341.60/x
  3. Step 3: Cross multiply
    81,463.60x = 122,195.40 × 68,341.60
  4. Step 4: Simplify right side
    81,463.60x = 8,351,029,148.64
  5. Step 5: Solve for x
    x = 8,351,029,148.64/81,463.60
  6. Step 6: Final answer
    x = 102,512.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.